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<?php
namespace Mpdf\Shaper;
use Mpdf\Ucdn;
class Indic
{
/* FROM hb-ot-shape-complex-indic-private.hh */
// indic_category
const OT_X = 0;
const OT_C = 1;
const OT_V = 2;
const OT_N = 3;
const OT_H = 4;
const OT_ZWNJ = 5;
const OT_ZWJ = 6;
const OT_M = 7; /* Matra or Dependent Vowel */
const OT_SM = 8;
const OT_VD = 9;
const OT_A = 10;
const OT_NBSP = 11;
const OT_DOTTEDCIRCLE = 12; /* Not in the spec, but special in Uniscribe. /Very very/ special! */
const OT_RS = 13; /* Register Shifter, used in Khmer OT spec */
const OT_COENG = 14;
const OT_REPHA = 15;
const OT_RA = 16; /* Not explicitly listed in the OT spec, but used in the grammar. */
const OT_CM = 17;
/* Visual positions in a syllable from left to right. */
/* FROM hb-ot-shape-complex-indic-private.hh */
// indic_position
const POS_START = 0;
const POS_RA_TO_BECOME_REPH = 1;
const POS_PRE_M = 2;
const POS_PRE_C = 3;
const POS_BASE_C = 4;
const POS_AFTER_MAIN = 5;
const POS_ABOVE_C = 6;
const POS_BEFORE_SUB = 7;
const POS_BELOW_C = 8;
const POS_AFTER_SUB = 9;
const POS_BEFORE_POST = 10;
const POS_POST_C = 11;
const POS_AFTER_POST = 12;
const POS_FINAL_C = 13;
const POS_SMVD = 14;
const POS_END = 15;
/*
* Basic features.
* These features are applied in order, one at a time, after initial_reordering.
*/
/*
* Must be in the same order as the indic_features array. Ones starting with _ are F_GLOBAL
* Ones without the _ are only applied where the mask says!
*/
const _NUKT = 0;
const _AKHN = 1;
const RPHF = 2;
const _RKRF = 3;
const PREF = 4;
const BLWF = 5;
const HALF = 6;
const ABVF = 7;
const PSTF = 8;
const CFAR = 9; // Khmer only
const _VATU = 10;
const _CJCT = 11;
const INIT = 12;
// Based on indic_category used to make string to find syllables
// OT_ to string character (using e.g. OT_C from INDIC) hb-ot-shape-complex-indic-private.hh
public static $indic_category_char = [
'x',
'C',
'V',
'N',
'H',
'Z',
'J',
'M',
'S',
'v',
'A', /* Spec gives Andutta U+0952 as OT_A. However, testing shows that Uniscribe
* treats U+0951..U+0952 all as OT_VD - see set_indic_properties */
's',
'D',
'F', /* Register shift Khmer only */
'G', /* Khmer only */
'r', /* 0D4E (dot reph) only one in Malayalam */
'R',
'm', /* Consonant medial only used in Indic 0A75 in Gurmukhi (0A00..0A7F) : also in Lao, Myanmar, Tai Tham, Javanese & Cham */
];
public static function set_indic_properties(&$info, $scriptblock)
{
$u = $info['uni'];
$type = self::indic_get_categories($u);
$cat = ($type & 0x7F);
$pos = ($type >> 8);
/*
* Re-assign category
*/
if ($u == 0x17D1) {
$cat = self::OT_X;
}
if ($cat == self::OT_X && self::in_range($u, 0x17CB, 0x17D3)) { /* Khmer Various signs */
/* These are like Top Matras. */
$cat = self::OT_M;
$pos = self::POS_ABOVE_C;
}
if ($u == 0x17C6) {
$cat = self::OT_N;
} /* Khmer Bindu doesn't like to be repositioned. */
if ($u == 0x17D2) {
$cat = self::OT_COENG;
} /* Khmer coeng */
/* The spec says U+0952 is OT_A. However, testing shows that Uniscribe
* treats U+0951..U+0952 all as OT_VD.
* TESTS:
* U+092E,U+0947,U+0952
* U+092E,U+0952,U+0947
* U+092E,U+0947,U+0951
* U+092E,U+0951,U+0947
* */
//if ($u == 0x0952) $cat = self::OT_A;
if (self::in_range($u, 0x0951, 0x0954)) {
$cat = self::OT_VD;
}
if ($u == 0x200C) {
$cat = self::OT_ZWNJ;
} elseif ($u == 0x200D) {
$cat = self::OT_ZWJ;
} elseif ($u == 0x25CC) {
$cat = self::OT_DOTTEDCIRCLE;
} elseif ($u == 0x0A71) {
$cat = self::OT_SM;
} /* GURMUKHI ADDAK. More like consonant medial. like 0A75. */
if ($cat == self::OT_REPHA) {
/* There are two kinds of characters marked as Repha:
* - The ones that are GenCat=Mn are already positioned visually, ie. after base. (eg. Khmer)
* - The ones that are GenCat=Lo is encoded logically, ie. beginning of syllable. (eg. Malayalam)
*
* We recategorize the first kind to look like a Nukta and attached to the base directly.
*/
if ($info['general_category'] == Ucdn::UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK) {
$cat = self::OT_N;
}
}
/*
* Re-assign position.
*/
if ((self::FLAG($cat) & (self::FLAG(self::OT_C) | self::FLAG(self::OT_CM) | self::FLAG(self::OT_RA) | self::FLAG(self::OT_V) | self::FLAG(self::OT_NBSP) | self::FLAG(self::OT_DOTTEDCIRCLE)))) { // = CONSONANT_FLAGS like is_consonant
if ($scriptblock == Ucdn::SCRIPT_KHMER) {
$pos = self::POS_BELOW_C;
} /* Khmer differs from Indic here. */
else {
$pos = self::POS_BASE_C;
} /* Will recategorize later based on font lookups. */
if (self::is_ra($u)) {
$cat = self::OT_RA;
}
} elseif ($cat == self::OT_M) {
$pos = self::matra_position($u, $pos);
} elseif ($cat == self::OT_SM || $cat == self::OT_VD) {
$pos = self::POS_SMVD;
}
if ($u == 0x0B01) {
$pos = self::POS_BEFORE_SUB;
} /* Oriya Bindu is BeforeSub in the spec. */
$info['indic_category'] = $cat;
$info['indic_position'] = $pos;
}
// syllable_type
const CONSONANT_SYLLABLE = 0;
const VOWEL_SYLLABLE = 1;
const STANDALONE_CLUSTER = 2;
const BROKEN_CLUSTER = 3;
const NON_INDIC_CLUSTER = 4;
public static function set_syllables(&$o, $s, &$broken_syllables)
{
$ptr = 0;
$syllable_serial = 1;
$broken_syllables = false;
while ($ptr < strlen($s)) {
$match = '';
$syllable_length = 1;
$syllable_type = self::NON_INDIC_CLUSTER;
// CONSONANT_SYLLABLE Consonant syllable
// From OT spec:
if (preg_match('/^([CR]m*[N]?(H[ZJ]?|[ZJ]H))*[CR]m*[N]?[A]?(H[ZJ]?|[M]*[N]?[H]?)?[S]?[v]{0,2}/', substr($s, $ptr), $ma)) {
// From HarfBuzz:
//if (preg_match('/^r?([CR]J?(Z?[N]{0,2})?[ZJ]?H(J[N]?)?){0,4}[CR]J?(Z?[N]{0,2})?A?((([ZJ]?H(J[N]?)?)|HZ)|(HJ)?([ZJ]{0,3}M[N]?(H|JHJR)?){0,4})?(S[Z]?)?[v]{0,2}/', substr($s,$ptr), $ma)) {
$syllable_length = strlen($ma[0]);
$syllable_type = self::CONSONANT_SYLLABLE;
} // VOWEL_SYLLABLE Vowel-based syllable
// From OT spec:
elseif (preg_match('/^(RH|r)?V[N]?([ZJ]?H[CR]m*|J[CR]m*)?([M]*[N]?[H]?)?[S]?[v]{0,2}/', substr($s, $ptr), $ma)) {
// From HarfBuzz:
//else if (preg_match('/^(RH|r)?V(Z?[N]{0,2})?(J|([ZJ]?H(J[N]?)?[CR]J?(Z?[N]{0,2})?){0,4}((([ZJ]?H(J[N]?)?)|HZ)|(HJ)?([ZJ]{0,3}M[N]?(H|JHJR)?){0,4})?(S[Z]?)?[v]{0,2})/', substr($s,$ptr), $ma)) {
$syllable_length = strlen($ma[0]);
$syllable_type = self::VOWEL_SYLLABLE;
} /* Apply only if it's a word start. */
// STANDALONE_CLUSTER Stand Alone syllable at start of word
// From OT spec:
elseif (($ptr == 0 ||
$o[$ptr - 1]['general_category'] < Ucdn::UNICODE_GENERAL_CATEGORY_LOWERCASE_LETTER ||
$o[$ptr - 1]['general_category'] > Ucdn::UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK
) && (preg_match('/^(RH|r)?[sD][N]?([ZJ]?H[CR]m*)?([M]*[N]?[H]?)?[S]?[v]{0,2}/', substr($s, $ptr), $ma))) {
// From HarfBuzz:
// && (preg_match('/^(RH|r)?[sD](Z?[N]{0,2})?(([ZJ]?H(J[N]?)?)[CR]J?(Z?[N]{0,2})?){0,4}((([ZJ]?H(J[N]?)?)|HZ)|(HJ)?([ZJ]{0,3}M[N]?(H|JHJR)?){0,4})?(S[Z]?)?[v]{0,2}/', substr($s,$ptr), $ma)) {
$syllable_length = strlen($ma[0]);
$syllable_type = self::STANDALONE_CLUSTER;
} // BROKEN_CLUSTER syllable
elseif (preg_match('/^(RH|r)?[N]?([ZJ]?H[CR])?([M]*[N]?[H]?)?[S]?[v]{0,2}/', substr($s, $ptr), $ma)) {
// From HarfBuzz:
//else if (preg_match('/^(RH|r)?(Z?[N]{0,2})?(([ZJ]?H(J[N]?)?)[CR]J?(Z?[N]{0,2})?){0,4}((([ZJ]?H(J[N]?)?)|HZ)|(HJ)?([ZJ]{0,3}M[N]?(H|JHJR)?){0,4})(S[Z]?)?[v]{0,2}/', substr($s,$ptr), $ma)) {
if (strlen($ma[0])) { // May match blank
$syllable_length = strlen($ma[0]);
$syllable_type = self::BROKEN_CLUSTER;
$broken_syllables = true;
}
}
for ($i = $ptr; $i < $ptr + $syllable_length; $i++) {
$o[$i]['syllable'] = ($syllable_serial << 4) | $syllable_type;
}
$ptr += $syllable_length;
$syllable_serial++;
if ($syllable_serial == 16) {
$syllable_serial = 1;
}
}
}
public static function set_syllables_sinhala(&$o, $s, &$broken_syllables)
{
$ptr = 0;
$syllable_serial = 1;
$broken_syllables = false;
while ($ptr < strlen($s)) {
$match = '';
$syllable_length = 1;
$syllable_type = self::NON_INDIC_CLUSTER;
// CONSONANT_SYLLABLE Consonant syllable
// From OT spec:
if (preg_match('/^([CR]HJ|[CR]JH){0,8}[CR][HM]{0,3}[S]{0,1}/', substr($s, $ptr), $ma)) {
$syllable_length = strlen($ma[0]);
$syllable_type = self::CONSONANT_SYLLABLE;
} // VOWEL_SYLLABLE Vowel-based syllable
// From OT spec:
elseif (preg_match('/^V[S]{0,1}/', substr($s, $ptr), $ma)) {
$syllable_length = strlen($ma[0]);
$syllable_type = self::VOWEL_SYLLABLE;
}
for ($i = $ptr; $i < $ptr + $syllable_length; $i++) {
$o[$i]['syllable'] = ($syllable_serial << 4) | $syllable_type;
}
$ptr += $syllable_length;
$syllable_serial++;
if ($syllable_serial == 16) {
$syllable_serial = 1;
}
}
}
public static function set_syllables_khmer(&$o, $s, &$broken_syllables)
{
$ptr = 0;
$syllable_serial = 1;
$broken_syllables = false;
while ($ptr < strlen($s)) {
$match = '';
$syllable_length = 1;
$syllable_type = self::NON_INDIC_CLUSTER;
// CONSONANT_SYLLABLE Consonant syllable
if (preg_match('/^r?([CR]J?((Z?F)?[N]{0,2})?[ZJ]?G(JN?)?){0,4}[CR]J?((Z?F)?[N]{0,2})?A?((([ZJ]?G(JN?)?)|GZ)|(GJ)?([ZJ]{0,3}MN?(H|JHJR)?){0,4})?(G([CR]J?((Z?F)?[N]{0,2})?|V))?(SZ?)?[v]{0,2}/', substr($s, $ptr), $ma)) {
$syllable_length = strlen($ma[0]);
$syllable_type = self::CONSONANT_SYLLABLE;
} // VOWEL_SYLLABLE Vowel-based syllable
elseif (preg_match('/^(RH|r)?V((Z?F)?[N]{0,2})?(J|([ZJ]?G(JN?)?[CR]J?((Z?F)?[N]{0,2})?){0,4}((([ZJ]?G(JN?)?)|GZ)|(GJ)?([ZJ]{0,3}MN?(H|JHJR)?){0,4})?(G([CR]J?((Z?F)?[N]{0,2})?|V))?(SZ?)?[v]{0,2})/', substr($s, $ptr), $ma)) {
$syllable_length = strlen($ma[0]);
$syllable_type = self::VOWEL_SYLLABLE;
} // BROKEN_CLUSTER syllable
elseif (preg_match('/^(RH|r)?((Z?F)?[N]{0,2})?(([ZJ]?G(JN?)?)[CR]J?((Z?F)?[N]{0,2})?){0,4}((([ZJ]?G(JN?)?)|GZ)|(GJ)?([ZJ]{0,3}MN?(H|JHJR)?){0,4})(G([CR]J?((Z?F)?[N]{0,2})?|V))?(SZ?)?[v]{0,2}/', substr($s, $ptr), $ma)) {
if (strlen($ma[0])) { // May match blank
$syllable_length = strlen($ma[0]);
$syllable_type = self::BROKEN_CLUSTER;
$broken_syllables = true;
}
}
for ($i = $ptr; $i < $ptr + $syllable_length; $i++) {
$o[$i]['syllable'] = ($syllable_serial << 4) | $syllable_type;
}
$ptr += $syllable_length;
$syllable_serial++;
if ($syllable_serial == 16) {
$syllable_serial = 1;
}
}
}
public static function initial_reordering(&$info, $GSUBdata, $broken_syllables, $indic_config, $scriptblock, $is_old_spec, $dottedcircle)
{
self::update_consonant_positions($info, $GSUBdata);
if ($broken_syllables && $dottedcircle) {
self::insert_dotted_circles($info, $dottedcircle);
}
$count = count($info);
if (!$count) {
return;
}
$last = 0;
$last_syllable = $info[0]['syllable'];
for ($i = 1; $i < $count; $i++) {
if ($last_syllable != $info[$i]['syllable']) {
self::initial_reordering_syllable($info, $GSUBdata, $indic_config, $scriptblock, $is_old_spec, $last, $i);
$last = $i;
$last_syllable = $info[$last]['syllable'];
}
}
self::initial_reordering_syllable($info, $GSUBdata, $indic_config, $scriptblock, $is_old_spec, $last, $count);
}
public static function update_consonant_positions(&$info, $GSUBdata)
{
$count = count($info);
for ($i = 0; $i < $count; $i++) {
if ($info[$i]['indic_position'] == self::POS_BASE_C) {
$c = $info[$i]['uni'];
// If would substitute...
if (isset($GSUBdata['pref'][$c])) {
$info[$i]['indic_position'] = self::POS_POST_C;
} elseif (isset($GSUBdata['blwf'][$c])) {
$info[$i]['indic_position'] = self::POS_BELOW_C;
} elseif (isset($GSUBdata['pstf'][$c])) {
$info[$i]['indic_position'] = self::POS_POST_C;
}
}
}
}
public static function insert_dotted_circles(&$info, $dottedcircle)
{
$idx = 0;
$last_syllable = 0;
while ($idx < count($info)) {
$syllable = $info[$idx]['syllable'];
$syllable_type = ($syllable & 0x0F);
if ($last_syllable != $syllable && $syllable_type == self::BROKEN_CLUSTER) {
$last_syllable = $syllable;
$dottedcircle[0]['syllable'] = $info[$idx]['syllable'];
/* Insert dottedcircle after possible Repha. */
while ($idx < count($info) && $last_syllable == $info[$idx]['syllable'] && $info[$idx]['indic_category'] == self::OT_REPHA) {
$idx++;
}
array_splice($info, $idx, 0, $dottedcircle);
} else {
$idx++;
}
}
// I am not sue how this code below got in here, since $idx should now be > count($info) and thus invalid.
// In case I am missing something(!) I'll leave a warning here for now:
if (isset($info[$idx])) {
throw new \Mpdf\MpdfException('Unexpected error occurred in Indic processing');
}
// In case of final bloken cluster...
//$syllable = $info[$idx]['syllable'];
//$syllable_type = ($syllable & 0x0F);
//if ($last_syllable != $syllable && $syllable_type == self::BROKEN_CLUSTER) {
// $dottedcircle[0]['syllable'] = $info[$idx]['syllable'];
// array_splice($info, $idx, 0, $dottedcircle);
//}
}
/* Rules from:
* https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx */
public static function initial_reordering_syllable(&$info, $GSUBdata, $indic_config, $scriptblock, $is_old_spec, $start, $end)
{
/* vowel_syllable: We made the vowels look like consonants. So uses the consonant logic! */
/* broken_cluster: We already inserted dotted-circles, so just call the standalone_cluster. */
/* standalone_cluster: We treat NBSP/dotted-circle as if they are consonants, so we should just chain. */
$syllable_type = ($info[$start]['syllable'] & 0x0F);
if ($syllable_type == self::NON_INDIC_CLUSTER) {
return;
}
if ($syllable_type == self::BROKEN_CLUSTER || $syllable_type == self::STANDALONE_CLUSTER) {
//if ($uniscribe_bug_compatible) {
/* For dotted-circle, this is what Uniscribe does:
* If dotted-circle is the last glyph, it just does nothing.
* i.e. It doesn't form Reph. */
if ($info[$end - 1]['indic_category'] == self::OT_DOTTEDCIRCLE) {
return;
}
}
/* 1. Find base consonant:
*
* The shaping engine finds the base consonant of the syllable, using the
* following algorithm: starting from the end of the syllable, move backwards
* until a consonant is found that does not have a below-base or post-base
* form (post-base forms have to follow below-base forms), or that is not a
* pre-base reordering Ra, or arrive at the first consonant. The consonant
* stopped at will be the base.
*
* o If the syllable starts with Ra + Halant (in a script that has Reph)
* and has more than one consonant, Ra is excluded from candidates for
* base consonants.
*/
$base = $end;
$has_reph = false;
$limit = $start;
if ($scriptblock != Ucdn::SCRIPT_KHMER) {
/* -> If the syllable starts with Ra + Halant (in a script that has Reph)
* and has more than one consonant, Ra is excluded from candidates for
* base consonants. */
if (count($GSUBdata['rphf']) /* ?? $indic_plan->mask_array[RPHF] */ && $start + 3 <= $end &&
(
($indic_config[4] == self::REPH_MODE_IMPLICIT && !self::is_joiner($info[$start + 2])) ||
($indic_config[4] == self::REPH_MODE_EXPLICIT && $info[$start + 2]['indic_category'] == self::OT_ZWJ)
)) {
/* See if it matches the 'rphf' feature. */
//$glyphs = array($info[$start]['uni'], $info[$start + 1]['uni']);
//if ($indic_plan->rphf->would_substitute ($glyphs, count($glyphs), true, face)) {
if (isset($GSUBdata['rphf'][$info[$start]['uni']]) && self::is_halant_or_coeng($info[$start + 1])) {
$limit += 2;
while ($limit < $end && self::is_joiner($info[$limit])) {
$limit++;
}
$base = $start;
$has_reph = true;
}
} elseif ($indic_config[4] == self::REPH_MODE_LOG_REPHA && $info[$start]['indic_category'] == self::OT_REPHA) {
$limit += 1;
while ($limit < $end && self::is_joiner($info[$limit])) {
$limit++;
}
$base = $start;
$has_reph = true;
}
}
switch ($indic_config[2]) { // base_pos
case self::BASE_POS_LAST:
/* -> starting from the end of the syllable, move backwards */
$i = $end;
$seen_below = false;
do {
$i--;
/* -> until a consonant is found */
if (self::is_consonant($info[$i])) {
/* -> that does not have a below-base or post-base form
* (post-base forms have to follow below-base forms), */
if ($info[$i]['indic_position'] != self::POS_BELOW_C && ($info[$i]['indic_position'] != self::POS_POST_C || $seen_below)) {
$base = $i;
break;
}
if ($info[$i]['indic_position'] == self::POS_BELOW_C) {
$seen_below = true;
}
/* -> or that is not a pre-base reordering Ra,
*
* IMPLEMENTATION NOTES:
*
* Our pre-base reordering Ra's are marked POS_POST_C, so will be skipped
* by the logic above already.
*/
/* -> or arrive at the first consonant. The consonant stopped at will
* be the base. */
$base = $i;
} else {
/* A ZWJ after a Halant stops the base search, and requests an explicit
* half form.
* [A ZWJ before a Halant, requests a subjoined form instead, and hence
* search continues. This is particularly important for Bengali
* sequence Ra,H,Ya that should form Ya-Phalaa by subjoining Ya] */
if ($start < $i && $info[$i]['indic_category'] == self::OT_ZWJ && $info[$i - 1]['indic_category'] == self::OT_H) {
if (!defined("OMIT_INDIC_FIX_1") || OMIT_INDIC_FIX_1 != 1) {
$base = $i;
} // INDIC_FIX_1
break;
}
// ZKI8
if ($start < $i && $info[$i]['indic_category'] == self::OT_ZWNJ) {
break;
}
}
} while ($i > $limit);
break;
case self::BASE_POS_FIRST:
/* In scripts without half forms (eg. Khmer), the first consonant is always the base. */
if (!$has_reph) {
$base = $limit;
}
/* Find the last base consonant that is not blocked by ZWJ. If there is
* a ZWJ right before a base consonant, that would request a subjoined form. */
for ($i = $limit; $i < $end; $i++) {
if (self::is_consonant($info[$i]) && $info[$i]['indic_position'] == self::POS_BASE_C) {
if ($limit < $i && $info[$i - 1]['indic_category'] == self::OT_ZWJ) {
break;
} else {
$base = $i;
}
}
}
/* Mark all subsequent consonants as below. */
for ($i = $base + 1; $i < $end; $i++) {
if (self::is_consonant($info[$i]) && $info[$i]['indic_position'] == self::POS_BASE_C) {
$info[$i]['indic_position'] = self::POS_BELOW_C;
}
}
break;
//default:
//assert (false);
/* fallthrough */
}
/* -> If the syllable starts with Ra + Halant (in a script that has Reph)
* and has more than one consonant, Ra is excluded from candidates for
* base consonants.
*
* Only do this for unforced Reph. (ie. not for Ra,H,ZWJ. */
if ($scriptblock != Ucdn::SCRIPT_KHMER) {
if ($has_reph && $base == $start && $limit - $base <= 2) {
/* Have no other consonant, so Reph is not formed and Ra becomes base. */
$has_reph = false;
}
}
/* 2. Decompose and reorder Matras:
*
* Each matra and any syllable modifier sign in the cluster are moved to the
* appropriate position relative to the consonant(s) in the cluster. The
* shaping engine decomposes two- or three-part matras into their constituent
* parts before any repositioning. Matra characters are classified by which
* consonant in a conjunct they have affinity for and are reordered to the
* following positions:
*
* o Before first half form in the syllable
* o After subjoined consonants
* o After post-form consonant
* o After main consonant (for above marks)
*
* IMPLEMENTATION NOTES:
*
* The normalize() routine has already decomposed matras for us, so we don't
* need to worry about that.
*/
/* 3. Reorder marks to canonical order:
*
* Adjacent nukta and halant or nukta and vedic sign are always repositioned
* if necessary, so that the nukta is first.
*
* IMPLEMENTATION NOTES:
*
* Use the combining Class from Unicode categories? to bubble_sort.
*/
/* Reorder characters */
for ($i = $start; $i < $base; $i++) {
$info[$i]['indic_position'] = min(self::POS_PRE_C, $info[$i]['indic_position']);
}
if ($base < $end) {
$info[$base]['indic_position'] = self::POS_BASE_C;
}
/* Mark final consonants. A final consonant is one appearing after a matra,
* ? only in Khmer. */
for ($i = $base + 1; $i < $end; $i++) {
if ($info[$i]['indic_category'] == self::OT_M) {
for ($j = $i + 1; $j < $end; $j++) {
if (self::is_consonant($info[$j])) {
$info[$j]['indic_position'] = self::POS_FINAL_C;
break;
}
}
break;
}
}
/* Handle beginning Ra */
if ($scriptblock != Ucdn::SCRIPT_KHMER) {
if ($has_reph) {
$info[$start]['indic_position'] = self::POS_RA_TO_BECOME_REPH;
}
}
/* For old-style Indic script tags, move the first post-base Halant after
* last consonant. Only do this if there is *not* a Halant after last
* consonant. Otherwise it becomes messy. */
if ($is_old_spec) {
for ($i = $base + 1; $i < $end; $i++) {
if ($info[$i]['indic_category'] == self::OT_H) {
for ($j = $end - 1; $j > $i; $j--) {
if (self::is_consonant($info[$j]) || $info[$j]['indic_category'] == self::OT_H) {
break;
}
}
if ($info[$j]['indic_category'] != self::OT_H && $j > $i) {
/* Move Halant to after last consonant. */
self::_move_info_pos($info, $i, $j + 1);
}
break;
}
}
}
/* Attach misc marks to previous char to move with them. */
$last_pos = self::POS_START;
for ($i = $start; $i < $end; $i++) {
if ((self::FLAG($info[$i]['indic_category']) & (self::FLAG(self::OT_ZWJ) | self::FLAG(self::OT_ZWNJ) | self::FLAG(self::OT_N) | self::FLAG(self::OT_RS) | self::FLAG(self::OT_H) | self::FLAG(self::OT_COENG) ))) {
$info[$i]['indic_position'] = $last_pos;
if ($info[$i]['indic_category'] == self::OT_H && $info[$i]['indic_position'] == self::POS_PRE_M) {
/*
* Uniscribe doesn't move the Halant with Left Matra.
* TEST: U+092B,U+093F,U+094DE
* We follow. This is important for the Sinhala
* U+0DDA split matra since it decomposes to U+0DD9,U+0DCA
* where U+0DD9 is a left matra and U+0DCA is the virama.
* We don't want to move the virama with the left matra.
* TEST: U+0D9A,U+0DDA
*/
for ($j = $i; $j > $start; $j--) {
if ($info[$j - 1]['indic_position'] != self::POS_PRE_M) {
$info[$i]['indic_position'] = $info[$j - 1]['indic_position'];
break;
}
}
}
} elseif ($info[$i]['indic_position'] != self::POS_SMVD) {
$last_pos = $info[$i]['indic_position'];
}
}
/* Re-attach ZWJ, ZWNJ, and halant to next char, for after-base consonants. */
$last_halant = $end;
for ($i = $base + 1; $i < $end; $i++) {
if (self::is_halant_or_coeng($info[$i])) {
$last_halant = $i;
} elseif (self::is_consonant($info[$i])) {
for ($j = $last_halant; $j < $i; $j++) {
if ($info[$j]['indic_position'] != self::POS_SMVD) {
$info[$j]['indic_position'] = $info[$i]['indic_position'];
}
}
}
}
if ($scriptblock == Ucdn::SCRIPT_KHMER) {
/* KHMER_FIX_2 */
/* Move Coeng+RO (Halant,Ra) sequence before base consonant. */
for ($i = $base + 1; $i < $end; $i++) {
if (self::is_halant_or_coeng($info[$i]) && self::is_ra($info[$i + 1]['uni'])) {
$info[$i]['indic_position'] = self::POS_PRE_C;
$info[$i + 1]['indic_position'] = self::POS_PRE_C;
break;
}
}
}
/*
if (!defined("OMIT_INDIC_FIX_2") || OMIT_INDIC_FIX_2 != 1) {
// INDIC_FIX_2
$ZWNJ_found = false;
$POST_ZWNJ_c_found = false;
for ($i = $base + 1; $i < $end; $i++) {
if ($info[$i]['indic_category'] == self::OT_ZWNJ) { $ZWNJ_found = true; }
else if ($ZWNJ_found && $info[$i]['indic_category'] == self::OT_C) { $POST_ZWNJ_c_found = true; }
else if ($POST_ZWNJ_c_found && $info[$i]['indic_position'] == self::POS_BEFORE_SUB) { $info[$i]['indic_position'] = self::POS_AFTER_SUB; }
}
}
*/
/* Setup masks now */
for ($i = $start; $i < $end; $i++) {
$info[$i]['mask'] = 0;
}
if ($scriptblock == Ucdn::SCRIPT_KHMER) {
/* Find a Coeng+RO (Halant,Ra) sequence and mark it for pre-base processing. */
$mask = self::FLAG(self::PREF);
for ($i = $base; $i < $end - 1; $i++) { /* KHMER_FIX_1 From $start (not base) */
if (self::is_halant_or_coeng($info[$i]) && self::is_ra($info[$i + 1]['uni'])) {
$info[$i]['mask'] |= self::FLAG(self::PREF);
$info[$i + 1]['mask'] |= self::FLAG(self::PREF);
/* Mark the subsequent stuff with 'cfar'. Used in Khmer.
* Read the feature spec.
* This allows distinguishing the following cases with MS Khmer fonts:
* U+1784,U+17D2,U+179A,U+17D2,U+1782 [C+Coeng+RO+Coeng+C] => Should activate CFAR
* U+1784,U+17D2,U+1782,U+17D2,U+179A [C+Coeng+C+Coeng+RO] => Should NOT activate CFAR
*/
for ($j = ($i + 2); $j < $end; $j++) {
$info[$j]['mask'] |= self::FLAG(self::CFAR);
}
break;
}
}
}
/* Sit tight, rock 'n roll! */
self::bubble_sort($info, $start, $end - $start);
/* Find base again */
$base = $end;
for ($i = $start; $i < $end; $i++) {
if ($info[$i]['indic_position'] == self::POS_BASE_C) {
$base = $i;
break;
}
}
if ($scriptblock != Ucdn::SCRIPT_KHMER) {
/* Reph */
for ($i = $start; $i < $end; $i++) {
if ($info[$i]['indic_position'] == self::POS_RA_TO_BECOME_REPH) {
$info[$i]['mask'] |= self::FLAG(self::RPHF);
}
}
/* Pre-base */
$mask = self::FLAG(self::HALF);
for ($i = $start; $i < $base; $i++) {
$info[$i]['mask'] |= $mask;
}
}
/* Post-base */
$mask = (self::FLAG(self::BLWF) | self::FLAG(self::ABVF) | self::FLAG(self::PSTF));
for ($i = $base + 1; $i < $end; $i++) {
$info[$i]['mask'] |= $mask;
}
if ($scriptblock != Ucdn::SCRIPT_KHMER) {
if (!defined("OMIT_INDIC_FIX_3") || OMIT_INDIC_FIX_3 != 1) {
/* INDIC_FIX_3 */
/* Find a (pre-base) Consonant, Halant,Ra sequence and mark Halant|Ra for below-base BLWF processing. */
// TEST CASE ক্র্ক in FreeSans versus Vrinda
if (($base - $start) >= 3) {
for ($i = $start; $i < ($base - 2); $i++) {
if (self::is_consonant($info[$i])) {
if (self::is_halant_or_coeng($info[$i + 1]) && self::is_ra($info[$i + 2]['uni'])) {
// If would substitute Halant+Ra...BLWF
if (isset($GSUBdata['blwf'][$info[$i + 2]['uni']])) {
$info[$i + 1]['mask'] |= self::FLAG(self::BLWF);
$info[$i + 2]['mask'] |= self::FLAG(self::BLWF);
} /* If would not substitute as blwf, mark Ra+Halant for RPHF using following Halant (if present) */ elseif (self::is_halant_or_coeng($info[$i + 3])) {
$info[$i + 2]['mask'] |= self::FLAG(self::RPHF);
$info[$i + 3]['mask'] |= self::FLAG(self::RPHF);
}
break;
}
}
}
}
}
}
if ($is_old_spec && $scriptblock == Ucdn::SCRIPT_DEVANAGARI) {
/* Old-spec eye-lash Ra needs special handling. From the spec:
* "The feature 'below-base form' is applied to consonants
* having below-base forms and following the base consonant.
* The exception is vattu, which may appear below half forms
* as well as below the base glyph. The feature 'below-base
* form' will be applied to all such occurrences of Ra as well."
*
* Test case: U+0924,U+094D,U+0930,U+094d,U+0915
* with Sanskrit 2003 font.
*
* However, note that Ra,Halant,ZWJ is the correct way to
* request eyelash form of Ra, so we wouldbn't inhibit it
* in that sequence.
*
* Test case: U+0924,U+094D,U+0930,U+094d,U+200D,U+0915
*/
for ($i = $start; ($i + 1) < $base; $i++) {
if ($info[$i]['indic_category'] == self::OT_RA && $info[$i + 1]['indic_category'] == self::OT_H &&
($i + 2 == $base || $info[$i + 2]['indic_category'] != self::OT_ZWJ)) {
$info[$i]['mask'] |= self::FLAG(self::BLWF);
$info[$i + 1]['mask'] |= self::FLAG(self::BLWF);
}
}
}
if ($scriptblock != Ucdn::SCRIPT_KHMER) {
if (count($GSUBdata['pref']) && $base + 2 < $end) {
/* Find a Halant,Ra sequence and mark it for pre-base processing. */
for ($i = $base + 1; $i + 1 < $end; $i++) {
// If old_spec find Ra-Halant...
if ((isset($GSUBdata['pref'][$info[$i + 1]['uni']]) && self::is_halant_or_coeng($info[$i]) && self::is_ra($info[$i + 1]['uni']) ) ||
($is_old_spec && isset($GSUBdata['pref'][$info[$i]['uni']]) && self::is_halant_or_coeng($info[$i + 1]) && self::is_ra($info[$i]['uni']) )
) {
$info[$i++]['mask'] |= self::FLAG(self::PREF);
$info[$i++]['mask'] |= self::FLAG(self::PREF);
break;
}
}
}
}
/* Apply ZWJ/ZWNJ effects */
for ($i = $start + 1; $i < $end; $i++) {
if (self::is_joiner($info[$i])) {
$non_joiner = ($info[$i]['indic_category'] == self::OT_ZWNJ);
$j = $i;
while ($j > $start) {
if (defined("OMIT_INDIC_FIX_4") && OMIT_INDIC_FIX_4 == 1) {
// INDIC_FIX_4 = do nothing - carry on //
// ZWNJ should block H C from forming blwf post-base - need to unmask backwards beyond first consonant arrived at //
if (!self::is_consonant($info[$j])) {
break;
}
}
$j--;
/* ZWJ/ZWNJ should disable CJCT. They do that by simply
* being there, since we don't skip them for the CJCT
* feature (ie. F_MANUAL_ZWJ) */
/* A ZWNJ disables HALF. */
if ($non_joiner) {
$info[$j]['mask'] &= ~(self::FLAG(self::HALF) | self::FLAG(self::BLWF));
}
}
}
}
}
public static function final_reordering(&$info, $GSUBdata, $indic_config, $scriptblock, $is_old_spec)
{
$count = count($info);
if (!$count) {
return;
}
$last = 0;
$last_syllable = $info[0]['syllable'];
for ($i = 1; $i < $count; $i++) {
if ($last_syllable != $info[$i]['syllable']) {
self::final_reordering_syllable($info, $GSUBdata, $indic_config, $scriptblock, $is_old_spec, $last, $i);
$last = $i;
$last_syllable = $info[$last]['syllable'];
}
}
self::final_reordering_syllable($info, $GSUBdata, $indic_config, $scriptblock, $is_old_spec, $last, $count);
}
public static function final_reordering_syllable(&$info, $GSUBdata, $indic_config, $scriptblock, $is_old_spec, $start, $end)
{
/* 4. Final reordering:
*
* After the localized forms and basic shaping forms GSUB features have been
* applied (see below), the shaping engine performs some final glyph
* reordering before applying all the remaining font features to the entire
* cluster.
*/
/* Find base again */
for ($base = $start; $base < $end; $base++) {
if ($info[$base]['indic_position'] >= self::POS_BASE_C) {
if ($start < $base && $info[$base]['indic_position'] > self::POS_BASE_C) {
$base--;
}
break;
}
}
if ($base == $end && $start < $base && $info[$base - 1]['indic_category'] != self::OT_ZWJ) {
$base--;
}
while ($start < $base && isset($info[$base]) && ($info[$base]['indic_category'] == self::OT_H || $info[$base]['indic_category'] == self::OT_N)) {
$base--;
}
/* o Reorder matras:
*
* If a pre-base matra character had been reordered before applying basic
* features, the glyph can be moved closer to the main consonant based on
* whether half-forms had been formed. Actual position for the matra is
* defined as "after last standalone halant glyph, after initial matra
* position and before the main consonant". If ZWJ or ZWNJ follow this
* halant, position is moved after it.
*/
if ($start + 1 < $end && $start < $base) { /* Otherwise there can't be any pre-base matra characters. */
/* If we lost track of base, alas, position before last thingy. */
$new_pos = ($base == $end) ? $base - 2 : $base - 1;
/* Malayalam / Tamil do not have "half" forms or explicit virama forms.
* The glyphs formed by 'half' are Chillus or ligated explicit viramas.
* We want to position matra after them.
*/
if ($scriptblock != Ucdn::SCRIPT_MALAYALAM && $scriptblock != Ucdn::SCRIPT_TAMIL) {
while ($new_pos > $start && !(self::is_one_of($info[$new_pos], (self::FLAG(self::OT_M) | self::FLAG(self::OT_H) | self::FLAG(self::OT_COENG))))) {
$new_pos--;
}
/* If we found no Halant we are done.
* Otherwise only proceed if the Halant does
* not belong to the Matra itself! */
if (self::is_halant_or_coeng($info[$new_pos]) && $info[$new_pos]['indic_position'] != self::POS_PRE_M) {
/* -> If ZWJ or ZWNJ follow this halant, position is moved after it. */
if ($new_pos + 1 < $end && self::is_joiner($info[$new_pos + 1])) {
$new_pos++;
}
} else {
$new_pos = $start;
} /* No move. */
}
if ($start < $new_pos && $info[$new_pos]['indic_position'] != self::POS_PRE_M) {
/* Now go see if there's actually any matras... */
for ($i = $new_pos; $i > $start; $i--) {
if ($info[$i - 1]['indic_position'] == self::POS_PRE_M) {
$old_pos = $i - 1;
//memmove (&info[$old_pos], &info[$old_pos + 1], ($new_pos - $old_pos) * sizeof ($info[0]));
self::_move_info_pos($info, $old_pos, $new_pos + 1);
if ($old_pos < $base && $base <= $new_pos) { /* Shouldn't actually happen. */
$base--;
}
$new_pos--;
}
}
}
}
/* o Reorder reph:
*
* Reph's original position is always at the beginning of the syllable,
* (i.e. it is not reordered at the character reordering stage). However,
* it will be reordered according to the basic-forms shaping results.
* Possible positions for reph, depending on the script, are; after main,
* before post-base consonant forms, and after post-base consonant forms.
*/
/* If there's anything after the Ra that has the REPH pos, it ought to be halant.
* Which means that the font has failed to ligate the Reph. In which case, we
* shouldn't move. */
if ($start + 1 < $end &&
$info[$start]['indic_position'] == self::POS_RA_TO_BECOME_REPH && $info[$start + 1]['indic_position'] != self::POS_RA_TO_BECOME_REPH) {
$reph_pos = $indic_config[3];
$skip_to_reph_step_5 = false;
$skip_to_reph_move = false;
/* 1. If reph should be positioned after post-base consonant forms,
* proceed to step 5.
*/
if ($reph_pos == self::REPH_POS_AFTER_POST) {
$skip_to_reph_step_5 = true;
}
/* 2. If the reph repositioning class is not after post-base: target
* position is after the first explicit halant glyph between the
* first post-reph consonant and last main consonant. If ZWJ or ZWNJ
* are following this halant, position is moved after it. If such
* position is found, this is the target position. Otherwise,
* proceed to the next step.
*
* Note: in old-implementation fonts, where classifications were
* fixed in shaping engine, there was no case where reph position
* will be found on this step.
*/
if (!$skip_to_reph_step_5) {
$new_reph_pos = $start + 1;
while ($new_reph_pos < $base && !self::is_halant_or_coeng($info[$new_reph_pos])) {
$new_reph_pos++;
}
if ($new_reph_pos < $base && self::is_halant_or_coeng($info[$new_reph_pos])) {
/* ->If ZWJ or ZWNJ are following this halant, position is moved after it. */
if ($new_reph_pos + 1 < $base && self::is_joiner($info[$new_reph_pos + 1])) {
$new_reph_pos++;
}
$skip_to_reph_move = true;
}
}
/* 3. If reph should be repositioned after the main consonant: find the
* first consonant not ligated with main, or find the first
* consonant that is not a potential pre-base reordering Ra.
*/
if ($reph_pos == self::REPH_POS_AFTER_MAIN && !$skip_to_reph_move && !$skip_to_reph_step_5) {
$new_reph_pos = $base;
/* XXX Skip potential pre-base reordering Ra. */
while ($new_reph_pos + 1 < $end && $info[$new_reph_pos + 1]['indic_position'] <= self::POS_AFTER_MAIN) {
$new_reph_pos++;
}
if ($new_reph_pos < $end) {
$skip_to_reph_move = true;
}
}
/* 4. If reph should be positioned before post-base consonant, find
* first post-base classified consonant not ligated with main. If no
* consonant is found, the target position should be before the
* first matra, syllable modifier sign or vedic sign.
*/
/* This is our take on what step 4 is trying to say (and failing, BADLY). */
if ($reph_pos == self::REPH_POS_AFTER_SUB && !$skip_to_reph_move && !$skip_to_reph_step_5) {
$new_reph_pos = $base;
while ($new_reph_pos < $end && isset($info[$new_reph_pos + 1]['indic_position']) &&
!( self::FLAG($info[$new_reph_pos + 1]['indic_position']) & (self::FLAG(self::POS_POST_C) | self::FLAG(self::POS_AFTER_POST) | self::FLAG(self::POS_SMVD)))) {
$new_reph_pos++;
}
if ($new_reph_pos < $end) {
$skip_to_reph_move = true;
}
}
/* 5. If no consonant is found in steps 3 or 4, move reph to a position
* immediately before the first post-base matra, syllable modifier
* sign or vedic sign that has a reordering class after the intended
* reph position. For example, if the reordering position for reph
* is post-main, it will skip above-base matras that also have a
* post-main position.
*/
if (!$skip_to_reph_move) {
/* Copied from step 2. */
$new_reph_pos = $start + 1;
while ($new_reph_pos < $base && !self::is_halant_or_coeng($info[$new_reph_pos])) {
$new_reph_pos++;
}
if ($new_reph_pos < $base && self::is_halant_or_coeng($info[$new_reph_pos])) {
/* ->If ZWJ or ZWNJ are following this halant, position is moved after it. */
if ($new_reph_pos + 1 < $base && self::is_joiner($info[$new_reph_pos + 1])) {
$new_reph_pos++;
}
$skip_to_reph_move = true;
}
}
/* 6. Otherwise, reorder reph to the end of the syllable.
*/
if (!$skip_to_reph_move) {
$new_reph_pos = $end - 1;
while ($new_reph_pos > $start && $info[$new_reph_pos]['indic_position'] == self::POS_SMVD) {
$new_reph_pos--;
}
/*
* If the Reph is to be ending up after a Matra,Halant sequence,
* position it before that Halant so it can interact with the Matra.
* However, if it's a plain Consonant,Halant we shouldn't do that.
* Uniscribe doesn't do this.
* TEST: U+0930,U+094D,U+0915,U+094B,U+094D
*/
//if (!$hb_options.uniscribe_bug_compatible && self::is_halant_or_coeng($info[$new_reph_pos])) {
if (self::is_halant_or_coeng($info[$new_reph_pos])) {
for ($i = $base + 1; $i < $new_reph_pos; $i++) {
if ($info[$i]['indic_category'] == self::OT_M) {
/* Ok, got it. */
$new_reph_pos--;
}
}
}
}
/* Move */
self::_move_info_pos($info, $start, $new_reph_pos + 1);
if ($start < $base && $base <= $new_reph_pos) {
$base--;
}
}
/* o Reorder pre-base reordering consonants:
*
* If a pre-base reordering consonant is found, reorder it according to
* the following rules:
*/
if (count($GSUBdata['pref']) && $base + 1 < $end) { /* Otherwise there can't be any pre-base reordering Ra. */
for ($i = $base + 1; $i < $end; $i++) {
if ($info[$i]['mask'] & self::FLAG(self::PREF)) {
/* 1. Only reorder a glyph produced by substitution during application
* of the <pref> feature. (Note that a font may shape a Ra consonant with
* the feature generally but block it in certain contexts.)
*/
// ??? Need to TEST if actual substitution has occurred
if ($i + 1 == $end || ($info[$i + 1]['mask'] & self::FLAG(self::PREF)) == 0) {
/*
* 2. Try to find a target position the same way as for pre-base matra.
* If it is found, reorder pre-base consonant glyph.
*
* 3. If position is not found, reorder immediately before main
* consonant.
*/
$new_pos = $base;
/* Malayalam / Tamil do not have "half" forms or explicit virama forms.
* The glyphs formed by 'half' are Chillus or ligated explicit viramas.
* We want to position matra after them.
*/
if ($scriptblock != Ucdn::SCRIPT_MALAYALAM && $scriptblock != Ucdn::SCRIPT_TAMIL) {
while ($new_pos > $start &&
!(self::is_one_of($info[$new_pos - 1], self::FLAG(self::OT_M) | self::FLAG(self::OT_H) | self::FLAG(self::OT_COENG)))) {
$new_pos--;
}
/* In Khmer coeng model, a V,Ra can go *after* matras. If it goes after a
* split matra, it should be reordered to *before* the left part of such matra. */
if ($new_pos > $start && $info[$new_pos - 1]['indic_category'] == self::OT_M) {
$old_pos = $i;
for ($i = $base + 1; $i < $old_pos; $i++) {
if ($info[$i]['indic_category'] == self::OT_M) {
$new_pos--;
break;
}
}
}
}
if ($new_pos > $start && self::is_halant_or_coeng($info[$new_pos - 1])) {
/* -> If ZWJ or ZWNJ follow this halant, position is moved after it. */
if ($new_pos < $end && self::is_joiner($info[$new_pos])) {
$new_pos++;
}
}
$old_pos = $i;
self::_move_info_pos($info, $old_pos, $new_pos);
if ($new_pos <= $base && $base < $old_pos) {
$base++;
}
}
break;
}
}
}
/* Apply 'init' to the Left Matra if it's a word start. */
if ($info[$start]['indic_position'] == self::POS_PRE_M &&
($start == 0 ||
($info[$start - 1]['general_category'] < Ucdn::UNICODE_GENERAL_CATEGORY_FORMAT || $info[$start - 1]['general_category'] > Ucdn::UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK)
)) {
$info[$start]['mask'] |= self::FLAG(self::INIT);
}
/*
* Finish off and go home!
*/
}
public static function _move_info_pos(&$info, $from, $to)
{
$t = [];
$t[0] = $info[$from];
if ($from > $to) {
array_splice($info, $from, 1);
array_splice($info, $to, 0, $t);
} else {
array_splice($info, $to, 0, $t);
array_splice($info, $from, 1);
}
}
public static $ra_chars = [
0x0930 => 1, /* Devanagari */
0x09B0 => 1, /* Bengali */
0x09F0 => 1, /* Bengali (Assamese) */
0x0A30 => 1, /* Gurmukhi */ /* No Reph */
0x0AB0 => 1, /* Gujarati */
0x0B30 => 1, /* Oriya */
0x0BB0 => 1, /* Tamil */ /* No Reph */
0x0C30 => 1, /* Telugu */ /* Reph formed only with ZWJ */
0x0CB0 => 1, /* Kannada */
0x0D30 => 1, /* Malayalam */ /* No Reph, Logical Repha */
0x0DBB => 1, /* Sinhala */ /* Reph formed only with ZWJ */
0x179A => 1, /* Khmer */ /* No Reph, Visual Repha */
];
public static function is_ra($u)
{
return isset(self::$ra_chars[$u]);
}
public static function is_one_of($info, $flags)
{
if (isset($info['is_ligature']) && $info['is_ligature']) {
return false;
} /* If it ligated, all bets are off. */
return !!(self::FLAG($info['indic_category']) & $flags);
}
public static function is_joiner($info)
{
return self::is_one_of($info, (self::FLAG(self::OT_ZWJ) | self::FLAG(self::OT_ZWNJ)));
}
/* Vowels and placeholders treated as if they were consonants. */
public static function is_consonant($info)
{
return self::is_one_of($info, (self::FLAG(self::OT_C) | self::FLAG(self::OT_CM) | self::FLAG(self::OT_RA) | self::FLAG(self::OT_V) | self::FLAG(self::OT_NBSP) | self::FLAG(self::OT_DOTTEDCIRCLE)));
}
public static function is_halant_or_coeng($info)
{
return self::is_one_of($info, (self::FLAG(self::OT_H) | self::FLAG(self::OT_COENG)));
}
// From hb-private.hh
public static function in_range($u, $lo, $hi)
{
if ((($lo ^ $hi) & $lo) == 0 && (($lo ^ $hi) & $hi) == ($lo ^ $hi) && (($lo ^ $hi) & (($lo ^ $hi) + 1)) == 0) {
return ($u & ~($lo ^ $hi)) == $lo;
} else {
return $lo <= $u && $u <= $hi;
}
}
// From hb-private.hh
public static function FLAG($x)
{
return (1 << ($x));
}
// BELOW from hb-ot-shape-complex-indic.cc
/*
* Indic configurations.
*/
// base_position
const BASE_POS_FIRST = 0;
const BASE_POS_LAST = 1;
// reph_position
const REPH_POS_DEFAULT = 10; // POS_BEFORE_POST,
const REPH_POS_AFTER_MAIN = 5; // POS_AFTER_MAIN,
const REPH_POS_BEFORE_SUB = 7; // POS_BEFORE_SUB,
const REPH_POS_AFTER_SUB = 9; // POS_AFTER_SUB,
const REPH_POS_BEFORE_POST = 10; // POS_BEFORE_POST,
const REPH_POS_AFTER_POST = 12; // POS_AFTER_POST
// reph_mode
const REPH_MODE_IMPLICIT = 0; /* Reph formed out of initial Ra,H sequence. */
const REPH_MODE_EXPLICIT = 1; /* Reph formed out of initial Ra,H,ZWJ sequence. */
const REPH_MODE_VIS_REPHA = 2; /* Encoded Repha character, no reordering needed. */
const REPH_MODE_LOG_REPHA = 3; /* Encoded Repha character, needs reordering. */
/*
struct of indic_configs{
KEY - script;
0 - has_old_spec;
1 - virama;
2 - base_pos;
3 - reph_pos;
4 - reph_mode;
};
*/
public static $indic_configs = [/* index is SCRIPT_number from UCDN */
9 => [true, 0x094D, 1, 10, 0],
10 => [true, 0x09CD, 1, 9, 0],
11 => [true, 0x0A4D, 1, 7, 0],
12 => [true, 0x0ACD, 1, 10, 0],
13 => [true, 0x0B4D, 1, 5, 0],
14 => [true, 0x0BCD, 1, 12, 0],
15 => [true, 0x0C4D, 1, 12, 1],
16 => [true, 0x0CCD, 1, 12, 0],
17 => [true, 0x0D4D, 1, 5, 3],
18 => [false, 0x0DCA, 0, 5, 1], /* Sinhala */
30 => [false, 0x17D2, 0, 10, 2], /* Khmer */
84 => [false, 0xA9C0, 1, 10, 0], /* Javanese */
];
/*
// from "hb-ot-shape-complex-indic-table.cc"
const ISC_A = 0; // INDIC_SYLLABIC_CATEGORY_AVAGRAHA Avagraha
const ISC_Bi = 8; // INDIC_SYLLABIC_CATEGORY_BINDU Bindu
const ISC_C = 1; // INDIC_SYLLABIC_CATEGORY_CONSONANT Consonant
const ISC_CD = 1; // INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD Consonant_Dead
const ISC_CF = 17; // INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL Consonant_Final
const ISC_CHL = 1; // INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER Consonant_Head_Letter
const ISC_CM = 17; // INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL Consonant_Medial
const ISC_CP = 11; // INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER Consonant_Placeholder
const ISC_CR = 15; // INDIC_SYLLABIC_CATEGORY_CONSONANT_REPHA Consonant_Repha
const ISC_CS = 1; // INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED Consonant_Subjoined
const ISC_ML = 0; // INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER Modifying_Letter
const ISC_N = 3; // INDIC_SYLLABIC_CATEGORY_NUKTA Nukta
const ISC_x = 0; // INDIC_SYLLABIC_CATEGORY_OTHER Other
const ISC_RS = 13; // INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER Register_Shifter
const ISC_TL = 0; // INDIC_SYLLABIC_CATEGORY_TONE_LETTER Tone_Letter
const ISC_TM = 3; // INDIC_SYLLABIC_CATEGORY_TONE_MARK Tone_Mark
const ISC_V = 4; // INDIC_SYLLABIC_CATEGORY_VIRAMA Virama
const ISC_Vs = 8; // INDIC_SYLLABIC_CATEGORY_VISARGA Visarga
const ISC_Vo = 2; // INDIC_SYLLABIC_CATEGORY_VOWEL Vowel
const ISC_M = 7; // INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT Vowel_Dependent
const ISC_VI = 2; // INDIC_SYLLABIC_CATEGORY_VOWEL_INDEPENDENT Vowel_Independent
const IMC_B = 8; // INDIC_MATRA_CATEGORY_BOTTOM Bottom
const IMC_BR = 11; // INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT Bottom_And_Right
const IMC_I = 15; // INDIC_MATRA_CATEGORY_INVISIBLE Invisible
const IMC_L = 3; // INDIC_MATRA_CATEGORY_LEFT Left
const IMC_LR = 11; // INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT Left_And_Right
const IMC_x = 15; // INDIC_MATRA_CATEGORY_NOT_APPLICABLE Not_Applicable
const IMC_O = 5; // INDIC_MATRA_CATEGORY_OVERSTRUCK Overstruck
const IMC_R = 11; // INDIC_MATRA_CATEGORY_RIGHT Right
const IMC_T = 6; // INDIC_MATRA_CATEGORY_TOP Top
const IMC_TB = 8; // INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM Top_And_Bottom
const IMC_TBR = 11; // INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT Top_And_Bottom_And_Right
const IMC_TL = 6; // INDIC_MATRA_CATEGORY_TOP_AND_LEFT Top_And_Left
const IMC_TLR = 11; // INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT Top_And_Left_And_Right
const IMC_TR = 11; // INDIC_MATRA_CATEGORY_TOP_AND_RIGHT Top_And_Right
const IMC_VOL = 2; // INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT Visual_Order_Left
If in original table = _(C,x), that = ISC_C,IMC_x
Value is IMC_x << 8 (or IMC_x * 256) = 3840
plus ISC_C = 1, so = 3841
*/
public static $indic_table = [
/* Devanagari (0900..097F) */
/* 0900 */ 3848, 3848, 3848, 3848, 3842, 3842, 3842, 3842,
/* 0908 */ 3842, 3842, 3842, 3842, 3842, 3842, 3842, 3842,
/* 0910 */ 3842, 3842, 3842, 3842, 3842, 3841, 3841, 3841,
/* 0918 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0920 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0928 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0930 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0938 */ 3841, 3841, 1543, 2823, 3843, 3840, 2823, 775,
/* 0940 */ 2823, 2055, 2055, 2055, 2055, 1543, 1543, 1543,
/* 0948 */ 1543, 2823, 2823, 2823, 2823, 2052, 775, 2823,
/* 0950 */ 3840, 3840, 3840, 3840, 3840, 1543, 2055, 2055,
/* 0958 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0960 */ 3842, 3842, 2055, 2055, 3840, 3840, 3840, 3840,
/* 0968 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0970 */ 3840, 3840, 3842, 3842, 3842, 3842, 3842, 3842,
/* 0978 */ 3840, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* Bengali (0980..09FF) */
/* 0980 */ 3840, 3848, 3848, 3848, 3840, 3842, 3842, 3842,
/* 0988 */ 3842, 3842, 3842, 3842, 3842, 3840, 3840, 3842,
/* 0990 */ 3842, 3840, 3840, 3842, 3842, 3841, 3841, 3841,
/* 0998 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 09A0 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 09A8 */ 3841, 3840, 3841, 3841, 3841, 3841, 3841, 3841,
/* 09B0 */ 3841, 3840, 3841, 3840, 3840, 3840, 3841, 3841,
/* 09B8 */ 3841, 3841, 3840, 3840, 3843, 3840, 2823, 775,
/* 09C0 */ 2823, 2055, 2055, 2055, 2055, 3840, 3840, 775,
/* 09C8 */ 775, 3840, 3840, 2823, 2823, 2052, 3841, 3840,
/* 09D0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 2823,
/* 09D8 */ 3840, 3840, 3840, 3840, 3841, 3841, 3840, 3841,
/* 09E0 */ 3842, 3842, 2055, 2055, 3840, 3840, 3840, 3840,
/* 09E8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 09F0 */ 3841, 3841, 3840, 3840, 3840, 3840, 3840, 3840,
/* 09F8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* Gurmukhi (0A00..0A7F) */
/* 0A00 */ 3840, 3848, 3848, 3848, 3840, 3842, 3842, 3842,
/* 0A08 */ 3842, 3842, 3842, 3840, 3840, 3840, 3840, 3842,
/* 0A10 */ 3842, 3840, 3840, 3842, 3842, 3841, 3841, 3841,
/* 0A18 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0A20 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0A28 */ 3841, 3840, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0A30 */ 3841, 3840, 3841, 3841, 3840, 3841, 3841, 3840,
/* 0A38 */ 3841, 3841, 3840, 3840, 3843, 3840, 2823, 775,
/* 0A40 */ 2823, 2055, 2055, 3840, 3840, 3840, 3840, 1543,
/* 0A48 */ 1543, 3840, 3840, 1543, 1543, 2052, 3840, 3840,
/* 0A50 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0A58 */ 3840, 3841, 3841, 3841, 3841, 3840, 3841, 3840,
/* 0A60 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0A68 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0A70 */ 3848, 3840, 13841, 13841, 3840, 3857, 3840, 3840,
/* 0A78 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* Gujarati (0A80..0AFF) */
/* 0A80 */ 3840, 3848, 3848, 3848, 3840, 3842, 3842, 3842,
/* 0A88 */ 3842, 3842, 3842, 3842, 3842, 3842, 3840, 3842,
/* 0A90 */ 3842, 3842, 3840, 3842, 3842, 3841, 3841, 3841,
/* 0A98 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0AA0 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0AA8 */ 3841, 3840, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0AB0 */ 3841, 3840, 3841, 3841, 3840, 3841, 3841, 3841,
/* 0AB8 */ 3841, 3841, 3840, 3840, 3843, 3840, 2823, 775,
/* 0AC0 */ 2823, 2055, 2055, 2055, 2055, 1543, 3840, 1543,
/* 0AC8 */ 1543, 2823, 3840, 2823, 2823, 2052, 3840, 3840,
/* 0AD0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0AD8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0AE0 */ 3842, 3842, 2055, 2055, 3840, 3840, 3840, 3840,
/* 0AE8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0AF0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0AF8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* Oriya (0B00..0B7F) */
/* 0B00 */ 3840, 3848, 3848, 3848, 3840, 3842, 3842, 3842,
/* 0B08 */ 3842, 3842, 3842, 3842, 3842, 3840, 3840, 3842,
/* 0B10 */ 3842, 3840, 3840, 3842, 3842, 3841, 3841, 3841,
/* 0B18 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0B20 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0B28 */ 3841, 3840, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0B30 */ 3841, 3840, 3841, 3841, 3840, 3841, 3841, 3841,
/* 0B38 */ 3841, 3841, 3840, 3840, 3843, 3840, 2823, 1543,
/* 0B40 */ 2823, 2055, 2055, 2055, 2055, 3840, 3840, 775,
/* 0B48 */ 1543, 3840, 3840, 2823, 2823, 2052, 3840, 3840,
/* 0B50 */ 3840, 3840, 3840, 3840, 3840, 3840, 1543, 2823,
/* 0B58 */ 3840, 3840, 3840, 3840, 3841, 3841, 3840, 3841,
/* 0B60 */ 3842, 3842, 2055, 2055, 3840, 3840, 3840, 3840,
/* 0B68 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0B70 */ 3840, 3841, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0B78 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* Tamil (0B80..0BFF) */
/* 0B80 */ 3840, 3840, 3848, 3840, 3840, 3842, 3842, 3842,
/* 0B88 */ 3842, 3842, 3842, 3840, 3840, 3840, 3842, 3842,
/* 0B90 */ 3842, 3840, 3842, 3842, 3842, 3841, 3840, 3840,
/* 0B98 */ 3840, 3841, 3841, 3840, 3841, 3840, 3841, 3841,
/* 0BA0 */ 3840, 3840, 3840, 3841, 3841, 3840, 3840, 3840,
/* 0BA8 */ 3841, 3841, 3841, 3840, 3840, 3840, 3841, 3841,
/* 0BB0 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0BB8 */ 3841, 3841, 3840, 3840, 3840, 3840, 2823, 2823,
/* 0BC0 */ 1543, 2055, 2055, 3840, 3840, 3840, 775, 775,
/* 0BC8 */ 775, 3840, 2823, 2823, 2823, 1540, 3840, 3840,
/* 0BD0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 2823,
/* 0BD8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0BE0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0BE8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0BF0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0BF8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* Telugu (0C00..0C7F) */
/* 0C00 */ 3840, 3848, 3848, 3848, 3840, 3842, 3842, 3842,
/* 0C08 */ 3842, 3842, 3842, 3842, 3842, 3840, 3842, 3842,
/* 0C10 */ 3842, 3840, 3842, 3842, 3842, 3841, 3841, 3841,
/* 0C18 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0C20 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0C28 */ 3841, 3840, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0C30 */ 3841, 3841, 3841, 3841, 3840, 3841, 3841, 3841,
/* 0C38 */ 3841, 3841, 3840, 3840, 3840, 3840, 1543, 1543,
/* 0C40 */ 1543, 2823, 2823, 2823, 2823, 3840, 1543, 1543,
/* 0C48 */ 2055, 3840, 1543, 1543, 1543, 1540, 3840, 3840,
/* 0C50 */ 3840, 3840, 3840, 3840, 3840, 1543, 2055, 3840,
/* 0C58 */ 3841, 3841, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0C60 */ 3842, 3842, 2055, 2055, 3840, 3840, 3840, 3840,
/* 0C68 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0C70 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0C78 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* Kannada (0C80..0CFF) */
/* 0C80 */ 3840, 3840, 3848, 3848, 3840, 3842, 3842, 3842,
/* 0C88 */ 3842, 3842, 3842, 3842, 3842, 3840, 3842, 3842,
/* 0C90 */ 3842, 3840, 3842, 3842, 3842, 3841, 3841, 3841,
/* 0C98 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0CA0 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0CA8 */ 3841, 3840, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0CB0 */ 3841, 3841, 3841, 3841, 3840, 3841, 3841, 3841,
/* 0CB8 */ 3841, 3841, 3840, 3840, 3843, 3840, 2823, 1543,
/* 0CC0 */ 2823, 2823, 2823, 2823, 2823, 3840, 1543, 2823,
/* 0CC8 */ 2823, 3840, 2823, 2823, 1543, 1540, 3840, 3840,
/* 0CD0 */ 3840, 3840, 3840, 3840, 3840, 2823, 2823, 3840,
/* 0CD8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3841, 3840,
/* 0CE0 */ 3842, 3842, 2055, 2055, 3840, 3840, 3840, 3840,
/* 0CE8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0CF0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0CF8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* Malayalam (0D00..0D7F) */
/* 0D00 */ 3840, 3840, 3848, 3848, 3840, 3842, 3842, 3842,
/* 0D08 */ 3842, 3842, 3842, 3842, 3842, 3840, 3842, 3842,
/* 0D10 */ 3842, 3840, 3842, 3842, 3842, 3841, 3841, 3841,
/* 0D18 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0D20 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0D28 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0D30 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0D38 */ 3841, 3841, 3841, 3840, 3840, 3840, 2823, 2823,
/* 0D40 */ 2823, 2823, 2823, 2055, 2055, 3840, 775, 775,
/* 0D48 */ 775, 3840, 2823, 2823, 2823, 1540, 3855, 3840,
/* 0D50 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 2823,
/* 0D58 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0D60 */ 3842, 3842, 2055, 2055, 3840, 3840, 3840, 3840,
/* 0D68 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0D70 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0D78 */ 3840, 3840, 3841, 3841, 3841, 3841, 3841, 3841,
/* Sinhala (0D80..0DFF) */
/* 0D80 */ 3840, 3840, 3848, 3848, 3840, 3842, 3842, 3842,
/* 0D88 */ 3842, 3842, 3842, 3842, 3842, 3842, 3842, 3842,
/* 0D90 */ 3842, 3842, 3842, 3842, 3842, 3842, 3842, 3840,
/* 0D98 */ 3840, 3840, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0DA0 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0DA8 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 0DB0 */ 3841, 3841, 3840, 3841, 3841, 3841, 3841, 3841,
/* 0DB8 */ 3841, 3841, 3841, 3841, 3840, 3841, 3840, 3840,
/* 0DC0 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3840,
/* 0DC8 */ 3840, 3840, 1540, 3840, 3840, 3840, 3840, 2823,
/* 0DD0 */ 2823, 2823, 1543, 1543, 2055, 3840, 2055, 3840,
/* 0DD8 */ 2823, 775, 1543, 775, 2823, 2823, 2823, 2823,
/* 0DE0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0DE8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 0DF0 */ 3840, 3840, 2823, 2823, 3840, 3840, 3840, 3840,
/* 0DF8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* Vedic Extensions (1CD0..1CFF) */
/* 1CD0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 1CD8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 1CE0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 1CE8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 1CF0 */ 3840, 3840, 3848, 3848, 3840, 3840, 3840, 3840,
/* 1CF8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
];
public static $khmer_table = [
/* Khmer (1780..17FF) */
/* 1780 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 1788 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 1790 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 1798 */ 3841, 3841, 3841, 3841, 3841, 3841, 3841, 3841,
/* 17A0 */ 3841, 3841, 3841, 3842, 3842, 3842, 3842, 3842,
/* 17A8 */ 3842, 3842, 3842, 3842, 3842, 3842, 3842, 3842,
/* 17B0 */ 3842, 3842, 3842, 3842, 3840, 3840, 2823, 1543,
/* 17B8 */ 1543, 1543, 1543, 2055, 2055, 2055, 1543, 2823,
/* 17C0 */ 2823, 775, 775, 775, 2823, 2823, 3848, 3848,
/* 17C8 */ 2823, 3853, 3853, 3840, 3855, 3840, 3840, 3840,
/* 17D0 */ 3840, 1540, 3844, 3840, 3840, 3840, 3840, 3840,
/* 17D8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 17E0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 17E8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 17F0 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
/* 17F8 */ 3840, 3840, 3840, 3840, 3840, 3840, 3840, 3840,
];
// from "hb-ot-shape-complex-indic-table.cc"
public static function indic_get_categories($u)
{
if (0x0900 <= $u && $u <= 0x0DFF) {
return self::$indic_table[$u - 0x0900 + 0]; // offset 0 for Most "indic"
}
if (0x1CD0 <= $u && $u <= 0x1D00) {
return self::$indic_table[$u - 0x1CD0 + 1152]; // offset for Vedic extensions
}
if (0x1780 <= $u && $u <= 0x17FF) {
return self::$khmer_table[$u - 0x1780]; // Khmer
}
if ($u == 0x00A0) {
return 3851; // (ISC_CP | (IMC_x << 8))
}
if ($u == 0x25CC) {
return 3851; // (ISC_CP | (IMC_x << 8))
}
return 3840; // (ISC_x | (IMC_x << 8))
}
// BELOW from hb-ot-shape-complex-indic.cc
/*
* Indic shaper.
*/
public static function IN_HALF_BLOCK($u, $Base)
{
return (($u & ~0x7F) == $Base);
}
public static function IS_DEVA($u)
{
return self::IN_HALF_BLOCK($u, 0x0900);
}
public static function IS_BENG($u)
{
return self::IN_HALF_BLOCK($u, 0x0980);
}
public static function IS_GURU($u)
{
return self::IN_HALF_BLOCK($u, 0x0A00);
}
public static function IS_GUJR($u)
{
return self::IN_HALF_BLOCK($u, 0x0A80);
}
public static function IS_ORYA($u)
{
return self::IN_HALF_BLOCK($u, 0x0B00);
}
public static function IS_TAML($u)
{
return self::IN_HALF_BLOCK($u, 0x0B80);
}
public static function IS_TELU($u)
{
return self::IN_HALF_BLOCK($u, 0x0C00);
}
public static function IS_KNDA($u)
{
return self::IN_HALF_BLOCK($u, 0x0C80);
}
public static function IS_MLYM($u)
{
return self::IN_HALF_BLOCK($u, 0x0D00);
}
public static function IS_SINH($u)
{
return self::IN_HALF_BLOCK($u, 0x0D80);
}
public static function IS_KHMR($u)
{
return self::IN_HALF_BLOCK($u, 0x1780);
}
public static function MATRA_POS_LEFT($u)
{
return self::POS_PRE_M;
}
public static function MATRA_POS_RIGHT($u)
{
return
(self::IS_DEVA($u) ? self::POS_AFTER_SUB :
(self::IS_BENG($u) ? self::POS_AFTER_POST :
(self::IS_GURU($u) ? self::POS_AFTER_POST :
(self::IS_GUJR($u) ? self::POS_AFTER_POST :
(self::IS_ORYA($u) ? self::POS_AFTER_POST :
(self::IS_TAML($u) ? self::POS_AFTER_POST :
(self::IS_TELU($u) ? ($u <= 0x0C42 ? self::POS_BEFORE_SUB : self::POS_AFTER_SUB) :
(self::IS_KNDA($u) ? ($u < 0x0CC3 || $u > 0xCD6 ? self::POS_BEFORE_SUB : self::POS_AFTER_SUB) :
(self::IS_MLYM($u) ? self::POS_AFTER_POST :
(self::IS_SINH($u) ? self::POS_AFTER_SUB :
(self::IS_KHMR($u) ? self::POS_AFTER_POST :
self::POS_AFTER_SUB))))))))))); /* default */
}
public static function MATRA_POS_TOP($u)
{
return /* BENG and MLYM don't have top matras. */
(self::IS_DEVA($u) ? self::POS_AFTER_SUB :
(self::IS_GURU($u) ? self::POS_AFTER_POST : /* Deviate from spec */
(self::IS_GUJR($u) ? self::POS_AFTER_SUB :
(self::IS_ORYA($u) ? self::POS_AFTER_MAIN :
(self::IS_TAML($u) ? self::POS_AFTER_SUB :
(self::IS_TELU($u) ? self::POS_BEFORE_SUB :
(self::IS_KNDA($u) ? self::POS_BEFORE_SUB :
(self::IS_SINH($u) ? self::POS_AFTER_SUB :
(self::IS_KHMR($u) ? self::POS_AFTER_POST :
self::POS_AFTER_SUB))))))))); /* default */
}
public static function MATRA_POS_BOTTOM($u)
{
return
(self::IS_DEVA($u) ? self::POS_AFTER_SUB :
(self::IS_BENG($u) ? self::POS_AFTER_SUB :
(self::IS_GURU($u) ? self::POS_AFTER_POST :
(self::IS_GUJR($u) ? self::POS_AFTER_POST :
(self::IS_ORYA($u) ? self::POS_AFTER_SUB :
(self::IS_TAML($u) ? self::POS_AFTER_POST :
(self::IS_TELU($u) ? self::POS_BEFORE_SUB :
(self::IS_KNDA($u) ? self::POS_BEFORE_SUB :
(self::IS_MLYM($u) ? self::POS_AFTER_POST :
(self::IS_SINH($u) ? self::POS_AFTER_SUB :
(self::IS_KHMR($u) ? self::POS_AFTER_POST :
self::POS_AFTER_SUB))))))))))); /* default */
}
public static function matra_position($u, $side)
{
switch ($side) {
case self::POS_PRE_C:
return self::MATRA_POS_LEFT($u);
case self::POS_POST_C:
return self::MATRA_POS_RIGHT($u);
case self::POS_ABOVE_C:
return self::MATRA_POS_TOP($u);
case self::POS_BELOW_C:
return self::MATRA_POS_BOTTOM($u);
}
return $side;
}
// vowel matras that have to be split into two parts.
// From Harfbuzz (old)
// New HarfBuzz uses /src/hb-ucdn/ucdn.c and unicodedata_db.h for full method of decomposition for all characters
// Should always fully decompose and then recompose back, but we will just do the split matras
public static function decompose_indic($ab)
{
$sub = [];
switch ($ab) {
/*
* Decompose split matras.
*/
/* bengali */
case 0x9cb:
$sub[0] = 0x9c7;
$sub[1] = 0x9be;
return $sub;
case 0x9cc:
$sub[0] = 0x9c7;
$sub[1] = 0x9d7;
return $sub;
/* oriya */
case 0xb48:
$sub[0] = 0xb47;
$sub[1] = 0xb56;
return $sub;
case 0xb4b:
$sub[0] = 0xb47;
$sub[1] = 0xb3e;
return $sub;
case 0xb4c:
$sub[0] = 0xb47;
$sub[1] = 0xb57;
return $sub;
/* tamil */
case 0xbca:
$sub[0] = 0xbc6;
$sub[1] = 0xbbe;
return $sub;
case 0xbcb:
$sub[0] = 0xbc7;
$sub[1] = 0xbbe;
return $sub;
case 0xbcc:
$sub[0] = 0xbc6;
$sub[1] = 0xbd7;
return $sub;
/* telugu */
case 0xc48:
$sub[0] = 0xc46;
$sub[1] = 0xc56;
return $sub;
/* kannada */
case 0xcc0:
$sub[0] = 0xcbf;
$sub[1] = 0xcd5;
return $sub;
case 0xcc7:
$sub[0] = 0xcc6;
$sub[1] = 0xcd5;
return $sub;
case 0xcc8:
$sub[0] = 0xcc6;
$sub[1] = 0xcd6;
return $sub;
case 0xcca:
$sub[0] = 0xcc6;
$sub[1] = 0xcc2;
return $sub;
case 0xccb:
$sub[0] = 0xcc6;
$sub[1] = 0xcc2;
$sub[2] = 0xcd5;
return $sub;
/* malayalam */
case 0xd4a:
$sub[0] = 0xd46;
$sub[1] = 0xd3e;
return $sub;
case 0xd4b:
$sub[0] = 0xd47;
$sub[1] = 0xd3e;
return $sub;
case 0xd4c:
$sub[0] = 0xd46;
$sub[1] = 0xd57;
return $sub;
/* sinhala */
// NB Some fonts break with these Sinhala decomps (although this is Uniscribe spec)
// Can check if character would be substituted by pstf and only decompose if true
// e.g. if (isset($GSUBdata['pstf'][$ab])) - would need to pass $GSUBdata as parameter to this function
case 0xdda:
$sub[0] = 0xdd9;
$sub[1] = 0xdca;
return $sub;
case 0xddc:
$sub[0] = 0xdd9;
$sub[1] = 0xdcf;
return $sub;
case 0xddd:
$sub[0] = 0xdd9;
$sub[1] = 0xdcf;
$sub[2] = 0xdca;
return $sub;
case 0xdde:
$sub[0] = 0xdd9;
$sub[1] = 0xddf;
return $sub;
/* khmer */
case 0x17be:
$sub[0] = 0x17c1;
$sub[1] = 0x17be;
return $sub;
case 0x17bf:
$sub[0] = 0x17c1;
$sub[1] = 0x17bf;
return $sub;
case 0x17c0:
$sub[0] = 0x17c1;
$sub[1] = 0x17c0;
return $sub;
case 0x17c4:
$sub[0] = 0x17c1;
$sub[1] = 0x17c4;
return $sub;
case 0x17c5:
$sub[0] = 0x17c1;
$sub[1] = 0x17c5;
return $sub;
/* tibetan - included here although does not use Inidc shaper in other ways */
case 0xf73:
$sub[0] = 0xf71;
$sub[1] = 0xf72;
return $sub;
case 0xf75:
$sub[0] = 0xf71;
$sub[1] = 0xf74;
return $sub;
case 0xf76:
$sub[0] = 0xfb2;
$sub[1] = 0xf80;
return $sub;
case 0xf77:
$sub[0] = 0xfb2;
$sub[1] = 0xf81;
return $sub;
case 0xf78:
$sub[0] = 0xfb3;
$sub[1] = 0xf80;
return $sub;
case 0xf79:
$sub[0] = 0xfb3;
$sub[1] = 0xf71;
$sub[2] = 0xf80;
return $sub;
case 0xf81:
$sub[0] = 0xf71;
$sub[1] = 0xf80;
return $sub;
}
return false;
}
public static function bubble_sort(&$arr, $start, $len)
{
if ($len < 2) {
return;
}
$k = $start + $len - 2;
while ($k >= $start) {
for ($j = $start; $j <= $k; $j++) {
if ($arr[$j]['indic_position'] > $arr[$j + 1]['indic_position']) {
$t = $arr[$j];
$arr[$j] = $arr[$j + 1];
$arr[$j + 1] = $t;
}
}
$k--;
}
}
}
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